flex infowindow 固定弹出方向 设立

esri|InfoWindow
{
	border-thickness: 0;
	font-size: 12;
	upper-left-radius: 7;
	upper-right-radius: 7; 
	/*infowindow始终从左下角弹出*/
	info-placement:lower-left;
	info-placement-mode:none;
}